Alves Luis M, Reis Tiago J, Afonso Rafael M, Martins Paulo A F
IDMEC, Departamento de Engenharia Mecânica, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1049-001 Lisboa, Portugal.
Materials (Basel). 2021 Feb 8;14(4):815. doi: 10.3390/ma14040815.
This paper presents a new joining method by a forming process for attaching sheets to tube ends. The process consists of two different forming stages carried out sequentially in a single stroke. Firstly, the free tube end is flared by compression with a contoured die, then is squeezed (indented) against the sheet surface to create a mechanical interlocking. The new process is carried out at an ambient temperature and, in contrast to existing joining by forming operations based on tube expansion, it avoids seal welds, tube protrusions above the sheet surfaces, and machining of grooves on the sheet holes to obtain the form‑fit joints. The paper starts by analyzing the process deformation mechanics and its main operating variables and finishes by presenting examples that demonstrate its effectiveness for attaching sheets to tube ends made from polyvinylchloride and aluminum. Experimental and numerical simulation work provides support to the presentation.
本文介绍了一种通过成形工艺将板材连接到管端的新连接方法。该工艺由在单次行程中依次进行的两个不同成形阶段组成。首先，用异形模具通过压缩使自由管端扩口，然后将其挤压（压入）到板材表面以形成机械互锁。新工艺在环境温度下进行，与现有的基于管材扩径的成形连接操作相比，它避免了密封焊接、管材在板材表面上方的突出以及在板材孔上加工凹槽以获得形状配合接头。本文首先分析工艺变形力学及其主要操作变量，最后通过实例展示其在将板材连接到由聚氯乙烯和铝制成的管端时的有效性。实验和数值模拟工作为本文的论述提供了支持。
